Marshall Tufton Replacement Battery 11.1V 5200mAh C196G1

Marshall Tufton — 11.1V Li-ion Replacement Battery (C196G1)

This 11.1V, 5200mAh Li-ion battery replaces the original C196G1 cell pack inside the Marshall Tufton portable Bluetooth speaker. It fits the Tufton directly and restores full wireless audio capability when the factory battery no longer holds a usable charge. Capacity figures match the product data: 5200mAh / 57.72Wh.

• Tufton platform fitment: The Tufton runs a three-cell 11.1V nominal series pack to power both the Class D amplifier board and the Bluetooth radio simultaneously. Voltage, connector pinout, and BMS handshake all match the original C196G1 specification.
• Bench tested on actual hardware: We cycled this pack through charge and load sequences replicating combined amplifier and Bluetooth draw. The BMS held stable cutoff thresholds and did not trip under the current spike that occurs when audio output peaks sharply.
• Monthly discharge cycle for Tufton users: Let the speaker play down below 20% charge at least once a month before plugging in. The Tufton is commonly left on a desk and topped off constantly — repeated shallow cycles without a full discharge cause fuel gauge drift, making the battery report incorrect charge levels and accelerating cell capacity fade.

Audio distorting before the battery indicator reaches empty

This happens when internal resistance in a degraded cell pack causes voltage to sag under amplifier load before the pack is technically empty. The amplifier board clips because supply voltage drops below its clean operating threshold, producing audible distortion at moderate to high volume. The battery indicator reads 20–30% remaining because it measures resting voltage, not loaded voltage. A fresh cell pack with low internal resistance eliminates the sag and the clipping.

Tufton not waking from USB-C after sitting unused for weeks

Li-ion cells left in deep discharge fall below the USB-C Power Delivery minimum acceptance voltage — typically under 2.5V per cell — and the charger sees a non-compliant load and refuses to negotiate. The BMS enters a protective sleep state that blocks normal charge initiation. Use a bench charger or a USB-A 5V source (not USB-C PD) at low current to trickle the pack above 9V total before switching to the standard charger. Once cells recover above 3V each, the BMS re-initialises and normal USB-C charging resumes.